Aziraphale could feel the panic starting at the edge of his senses and knew this well of calm he'd found within was going to start cracking soon. But he had to be honest, he owed it to Crowley.
"I knew you cared, of course, we were friends, best friends but..."he sighed, "I know I'm not exciting Crowley. I'm slow and boring and soft. And you...you aren't any of those things" And while Crowley may not think so Aziraphale believed that the demon deserved more than anything a stuffy old angel could give him.